W79E548 Datasheet, PDF (23/79 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E548/W79L548
P5.7-0: General purpose I/O port. Port 5 can not use bit-addressable instruction (SETB or CLR).
Demo code:
ORL P5,#00000010B
; Set P5.1=H
ANL P5,#11111101B
; Clear P5.1=L
Port 6
Bit:
7
6
5
4
3
2
1
0
P6.7 P6.6 P6.5 P6.4 P6.3 P6.2 P6.1 P6.0
Mnemonic: P6
Address: B2h
P6.7-0: General purpose I/O port. Port 6 can not use bit-addressable instruction (SETB or CLR).
Port 7
Bit:
7
6
5
4
3
2
1
0
P7.7 P7.6 P7.5 P7.4 P7.3 P7.2 P7.1 P7.0
Mnemonic: P7
Address: B3h
P7.7-0: General purpose I/O port. Port 7 can not use bit-addressable instruction (SETB or CLR).
Interrupt Priority
Bit:
7
-
6
5
4
3
2
1
0
-
PT2
PS
PT1 PX1 PT0 PX0
Mnemonic: IP
Address: B8h
IP.7:
PT2:
PS:
PT1:
PX1:
PT0:
PX0:
This bit is un-implemented and will read high.
This bit defines the Timer 2 interrupt priority. PT2 = 1 sets it to higher priority level.
This bit defines the Serial port 0 interrupt priority. PS = 1 sets it to higher priority level.
This bit defines the Timer 1 interrupt priority. PT1 = 1 sets it to higher priority level.
This bit defines the External interrupt 1 priority. PX1 = 1 sets it to higher priority level.
This bit defines the Timer 0 interrupt priority. PT0 = 1 sets it to higher priority level.
This bit defines the External interrupt 0 priority. PX0 = 1 sets it to higher priority level.
Slave Address Mask Enable
Bit:
7
6
5
4
3
2
1
0
Mnemonic: SADEN
Address: B9h
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Publication Release Date: December 12, 2005
Revision A1